:root {
  --bg: #fbfaf7;
  --fg: #1f2421;
  --muted: #5d655f;
  --accent: #2f5d3a;
  --accent-fg: #fff;
  --error: #a32020;
  --border: #d5d8d3;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151816; --fg: #e8ebe7; --muted: #a2aaa4; --accent: #7fb88d; --accent-fg: #0d140f; --error: #ff8a80; --border: #3a403b; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 32rem; margin: 0 auto; padding: max(1.5rem, env(safe-area-inset-top)) 1rem 2rem; }
h1 { font-size: 1.6rem; line-height: 1.2; }
.muted { color: var(--muted); }
.error { color: var(--error); font-weight: 600; }
.stack { display: grid; gap: 1rem; }
label { display: grid; gap: .3rem; font-weight: 600; }
input {
  font: inherit;
  padding: .75rem;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: inherit;
}
button {
  font: inherit;
  font-weight: 600;
  min-height: 48px;
  padding: .75rem 1.25rem;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-fg);
}
button.secondary { background: transparent; color: var(--fg); border: 1px solid var(--border); }